Anticlimbing device



April 9, 1935. G. D ALVORD ANTICLIMBING DEVICE Filed July 23, 1932Patented Apr. 9, 1935 UNITED STATES ANTICLIMBING DEVICE Grove DeanAlvord, Pittsburgh, Pa., assignor to Blaw-Knox Company ration of NewJersey Blawnox, Pa a corpo- Application July 28, 193.2, Serial No.525,522

Claims.

This invention relates to anti-climbing devices for preventingunauthorized persons from climbing various structures. It is describedherein particularly as applied to an electric transmis- 5 sion tower,although it is capable of use with other structures.

On various occasions, children have climbed transmission towers and comein contact with high tension electric wires suspended therefrom, withserious and sometimes fatal results. The present invention provides ameans for preventing unauthorized persons, especially small children,from climbing electric transmission towers or other structures, therebyavoiding the danger of accident from this cause.

Referring to the accompanying drawing, which illustrates two embodimentsof my invention,

Figure 1 illustrates the lower portion of an electric transmission towerhaving the anticlimbing devices applied thereto;

Figure 2 is a plan View and Figure 3 is a side elevation of one of thedevices;

Figure 4 is a section taken on the line IV-IV of Figure 2;

Figure 5 is a section similar to Figure 4, but showing a modifiedembodiment of the invention, and

Figure 6 is a sectional view through one of the angle members of thetower and illustrating one means for clamping the device to the tower.

Referring more particularly to the accompanying drawing, the lower partof an electric transmission tower is shown in Figure 1. The tower isconstructed of angles 2 forming the corners of the tower, andreinforcing angles 3. Secured to the angles 2 and 3 at places suitablefor preventing children from climbing the tower are barbed anti-climbingdevices, indicated generally by the reference numeral 4.

In the form illustrated in Figures 2, 3 and 4, which is the preferredembodiment of my invention, the device comprises an angle 5 adapted tofit over the outer corner of the angle members 2 and 3 of the tower andto be detachably secured thereto. The angle 5 is provided at intervalswith pairs of openings 6 which extend through the angle along the cornerI thereof. Staples, indicated generally by the reference numeral 8, areinserted from the inside of the angle through the openings, and at leastone of the prongs of each staple is bent so as to secure the staple tothe angle. In the form shown in Figures 2, 3 and 4, one of the prongs 9of each staple extends in a substantially vertical direction, but theother prongs I0 and H are bent at an angle so as to secure the staplesto the angle 5. The shank l2 of each staple lies on the inside of theangle 5, the prongs 9, IB and H extending through the openings 5; Theangle has holes 20 for receiving bolts which secure the angle to thetower structure, as hereinafter described.

In the embodiment shown in Figure 5, barbs H are welded to an angle l5,as indicated by the reference numeral 5. The construction is otherwisesimilar to that already described in connection with the embodimentshown in Figures 2 to 4.

In Figure 6 there is illustrated one means for securing theanti-climbing devices to the angle member 2 or 3 of the electrictransmission tower, although other means may be employed. In thisfigure, the device is of the type illustrated in Figure 5, in which thebarbs are welded to the angle, but it will be understood that theembodiment in which the staples extend through openings in the angle 5,as illustrated in Figures 2 to 4, may be clamped in a similar manner tothe tower. The angle l5 of the anti-climbing device is secured to theangle member 2 of the tower by two J bolts, the curved ends ll of whichhook over the edges l8 of the angle member 2. The other end IQ of eachbolt passes through an opening 20 in the angle [5. Nuts 2| hold theangle 15 spaced from the member 2 a distance equal to the thickness ofthe bolts.

The anti-climbing devices are preferably made u up in lengths of about 4ft. and are attached to the tower structure between the joints thereof.The space between the joints or places where the angles are bolted toone another is usually considerably more than 4 ft. and frequently asmuch as 10 or 12 ft. so that when one of the devices is attached midwayon such a span, it is difficult for anyone, and impossible for a smallchild, to climb past the devices without scratching himselfconsiderably. These devices, however, do not prevent the employee of thepower company from climbing the tower when necessary since the emplcyeemay be provided with suitable means for passing the anti-climbingdevices.

Although it is preferred to secure the spikes or barbs to a rigid membersuch as the angle 5 or I5 and then secure the angles to the towerstructure as by clamping, the barbs or spikes may be secured directly tothe tower by welding or by providing openings through which the barbs ofthe staples project in a manner similar to that shown in Figures 2, 3and 4. The embodiment in which the barbs are secured to a member which,in turn, is secured to the tower structure is preferred since with thisarrangement the difiiculty of handling tower members with barbs securedthereto is eliminated. It is inconvenient to handle'the tower membersduring shipment and erection where the barbs are secured to the towermembers before the tower is erected. There also. is less danger ofdamaging the devices where they are handled and shipped separate fromthe tower members. The barbs may be secured to theangle or IS in variousways either by welding or by the method illustrated in Figures 2, 3 and4. Of the two illustrated methods, the method of providing openings inthe angle and inserting the staples therein is preferred over thewelding method, since the former method eliminates the necessity ofwelding and also enables the barbs to be turned in thedesired directionsaccording to the particular place in.

which the anti-climbing device is located.

I have illustrated and described two embodiments of my invention. It isto be understood, however, that the invention may be otherwise embodiedwithin the scope of the followingclaims.

I claim: V

1. A device for preventing'persons from climbing a structure, comprisingan angle adapted to be-detachably secured to the structure, said anglebeing perforated at intervals along its corner,

barbs extending through the perforations and secured to the angle, andmeans for securing the angle to the structure.

2. A device for preventing persons from climbing a structure, comprisingan angle adapted to be detachably secured to the structure, said anglebeing perforated at spaced intervals along its corner, staples extendingthrough the perforations and secured to said angle, and means fordetachably securing the angle to the structure.

3. A device for preventing persons from climb- .ing a structure,comprising an angle adapted to be detachably secured to the structure,said angle being perforated atspaced intervals along its corner, staplesextending through the perforations, at least one prong of the staplesbeing bent to secure it to the angle. I r

4. A device for preventing persons from clim ing a structure, comprisingan angle adapted to be secured to a member of the structure, said anglebeing provided with barbs, and J bolts securing said angle to saidmember of the structure, said member being imperforate at the point ofattachmentof said angle. 7

5. The. combination with a structure having

